Washing drum for photographic pictures



Ju e 24, 1930. w. M. scl-luu'z WASHING DRUM FOR PHOTOGRAPHIC PICTURES Filed llay 15. 1929 WMJCZUZZZ A 'AZZb -ney Patented June 24, 1930 I UNITED sT-A TES'PATENT. OFFICE wom eme ,m scnum'z, or BaaLIN-kmsnoasr, GERMANY, Assmnoa'ro scnn'ame-nmaum A. a, or BERLIN, onammr wasnme miuu' roa, rno'roermrmc rrc'runns Application med lay 18, 1929, Serial K0.

With the washing drums for photographic pictures, as used up to now, the drawback is encountered that, owing to thecentrifugal action of the currents of the liquid in the drum, as caused by the rotation of this latter,the pictures are pressed against the inner wall of the cylindrical drum, in consequence whereof the pictures contact with one another and the fixing salt, as hyposulphite of sodium, therefore, is not washed out in a sufiicient manner; These pictures tend, therefore, to become yellow, as well as spotty, in the course of time.

Endeavors have been'made to obviate these drawbacks, for instance by providing the wall of the drum or' cylinder with apertures of various sizes and shapes, as we as by providing above the drum or c linder a spray for rinsing the pictures a hering to said wall. I The problem is solved by the present invention illustrated diagrammatically and by way of example on the accompanying drawing on which Figure 1 is a side-view of a washing apparatus having a washing drum designed according to this invention, Figure 2 is a side-view of this apparatus, Figure 3 is a similar representation showing the washing drum lifted, Figure 4 is a sideview solely of said drum, Figure'5 is a frontal view of the drum, and Figure 6 shows some details of the drum, drawn to an enlarged scale.

On the drawing, (i denotes the drum, the circumferential wall of which is composed of radial portions b and oblique portions (1,

the transverse section of the drum resembling,'therefore, a ratchet-wheel: The drum may any other consist of sheet-metal or of suitable material, and its end walls 7 are provided with openings which are circular in the example shown, but may also be designed as slots. Slots or circular openings 0 are also provided in ,theradial portions 6 of the drum. The drum is located in a trou h g supported by a frame 2'. The troug is filled with the washing liquid which enters into the drum through the frontal apertures and 5 the apertures c. The currents of liquid en- -The chain-wheel p is 862,713, and in Germany Kay 19, 1928.

tering into the drum through. the

apertures 0 flow practically tangentially with respect to the circumference of the drum, and press the pictures tending to deposit on the wall portlons 6 off into the interior of the drum turned over and where they are continually whirled around one another so as to be washed very 'thorou ghly and uniformly.

The drum is provided with pivots Z supported [in open bearings shown in dotted lines in is rotated by dicated 'only by on the trough, as Fig. means of an electromotor 1" also supported on the frame '2' and drivin worm m meshing with a worm-wheel n dotted lines in Fig 3) coupled with a chain-wheel 0 2. The drum a ins. 2 and dr1ving an-.

other chaln-wheel p-by means-of a cham'g.

a shaft extending parallel to above it with small friction can contact with large friction disks t firmly rum. It is obvious that connected with the the electromotor rotates the intermediary of the members and t.

The wheels rod u is connected by a rod 4) its other end is connected b a lever y secured to one en n and 0, as well as p, are attached to a rod a hinged at its lower end a transverse member 71' of the frame 21.

coupled by means of the drum and disks 8 which drum by the a a a apw to The with a doublea rod w'with 6f a shaft y.

To this shaft are also aflixed' two arms 2,

one at the one end of said shaft, near the lever 31, and the other at the other end of the said shaft. From of vsaid arms is suspended a the free end of each link 2' which is coupled w1th= one of the journals lof the washing drum.

The drum is suspended from said links the pressure exerted by itsweight is transmitted by the members 2, y, y, to the friction roll 8 which is.

rim of' the large friction when the electromotor is is rotated, as already 2, and

and u, pressed upon the disk t. Therefore, in operation, the drum described.

m, w, '0 thereby A set of such members as u, 'v, w, 02,1 2 is provided not only at the one frontal end of the machine, but at the other frontal end normal with said frictiondisk forming also. The treadle extends from the one one of t e motion transmitting means. I lever to to the other lever w, and the two 5. A washing apparatus for photographlc rods u carry the lon 'tudinal shafts s? to plctures, comprising, in comblnatlon with a which the two small iction disks 8 are aftrough, a drum, the peripheral wall of which fixed. The ends proper of these rods are s composed of radial portions hav ng openconnected with one another by a bar it rugs, and of oblique, port ons therebetween, with the aid of which, in conjunction with and means for rotating-said drum, a fr ct on the treadle 'w the disks 8 can be withdrawn disk connected with the drumand a frict on from the large disks t and simultaneously roll contactlng normally with said disk 10 therewith the drum can be lifted, as shown forming members of the motion transmit in Fig. 3. ting means, a turnable rod havin said roll A certain part of the circumferential wall attached to Its free end, this red 8mg pivv of the drum IS designed as a flap 1: (Fig. 5).. oted ipgactlcally diagonally opposite to the When this flap is opened (position drawn said ct1on roll, a double-armed lever ar- 80 in dotted lines in Fi 5) the pictures can be ranged below the s a1d troug a rod connectintroduced into the um and, of course, also the 'first-mentloned' rod and sad lever removed from it. W1 h one another, the'arrangement being In order to lift the drum out of the trough such thatthe friction roll is withdrawn from g, and to interrupt at the same time the fricthe friction disk when the second rod is tional driving connection between the roll a sub ected to a pull by the said lever, and and the disk It, the treadle w is depressed in means for lifting simultaneously therewith the direction of the arrow I whereby the the out of the trough by the other arm double-armed lever w will be turned and siof the said lever. multaneously therewith the rod '0 will turn 6. A washing apparatus for photographic 90 the'rod u in the direction of the arrow II, plctures comprising, in combinati n ith in consequence whereof the roll a will be a trough, a the peripheral wall of withdrawn from the disk at. The rear arm which 1s composed of radial portions having of the lever to will lift the rod :11 whereby openings, and of oblique portions therebealso the arms y and 2 will be lifted and, thus, tween, and means for rotating said drum, a 95 the drum will be withdrawn from the trough friction disk connected with the drum and in the direction indicated by the arrow HI. a fr1ct1on roll contacting normally with said en the pressure exerted upon the tread skforming members of the motion transdle ceases, all movable members return aumittlng means, a turnable rod havingsaid tomatically into their former position. roll attached to its free end, this rod being 100 I claim: I pivoted practically diagonally opposite of I 1. A washing apparatus for photographic the said friction roll, a double-armed lever pictures, comprising in combination with a arranged below the said trough, a rod contrough, a drum, the peripheral wall of WhlCh nectmg the first-mentioned rod and said 0 is composed of radial portions having openlever with one another, turnable arms from 5 ings, and of oblique portions therebetween, which the drum is suspended and maintained said drum being rotatably supported in said in proper posit on w thin the trough, and trough. means for transmitting power from the 2.'A washing apparatus for photographic other arm of the double-armed lever to the pictures, comprising, in combination with -a last-mentioned means. 7

trough, a drum, the peripheral wall of which 7. A washing apparatus for photographic is composed of radial portions having openpictures, comprising, in combination with a ings, and of oblique portions therebetween, trough, a drum, the peripheral wall of which and means for rotating said drum. is composed of radial portions having open- 3. A washing apparatus for photographic ings, and of oblique portions therebetween, 115 pictures, comprising, in comblnatlon with a and means for rotatmg said drum, a. frictrou h, a rotary drum, the peripheral wall tion disk connected with the drum and a of w 'ch is composed of radial portions havfriction roll contacting normally with said ing openings, and of oblique portions theredisk forming members of the motion transbetween, a motor, and means for transm1tmitting means, a turnable rod having said 120 ting motion from said motor to said drum. roll attached to its free end, this rod being 4. A washing apparatus for photographic pivoted practically diagonally opposite to pictures, comprislng, in com'blnation' with the said friction roll, a double-armed lover a trough," a drumrotatably supported therearranged below the said trough, a rod conin, the peripheral wall of which is composed necting the first-mentioned 'rod and said 12: of radial portions having openings, and of lever with one another, the arrangement beoblique portions therebetween, a friction ing such that the friction roll is withdrawn disk connected with said drum, and means from the friction disk when the second rod "for transmitting motion from said motor is subjected to a pull b the said lever, and

. to the-said drum, a friction roll contacting .means for lifting simultaneously therewith 13L the drum out of the trou%h by the other arm of the said lever, turnab e arms from which the drum is suspended and maintained in proper EOSitiOIl within the trough a shaft to whic said arms are aflixed, a third arm at this shaft, and a rod connectin this arm with the other arm of said dou le-armed lever.

In testimony whereof I afiix m si ature.

WOLFGANG MAX S H TZ. 

